Thank you for your follow-up. That does help. Do you know if he owns any property in Texas or just in Louisiana? If he only has property in Louisiana, then Louisiana laws would govern. This is called 'palimony', which is a contractual obligation to support someone who is not a spouse. This type of law falls under contract law and not under family or divorce law. The issue is that Louisiana currently does not recognize palimony as actionable under their current regulations. What they can recognize is potential 'common law' marriages from other states. That means that if you or your attorney can somehow prove that you were engaged in a common law relationship in Texas, then you may have grounds to seek benefits. Under Texas law you can claim benefits if you can cover the conditions under this statute--and then use that as a demand for compensation:
SUBCHAPTER E. MARRIAGE WITHOUT FORMALITIES
Sec. 2.401. PROOF OF INFORMAL MARRIAGE. (a) In a judicial, administrative, or other proceeding, the marriage of a man and woman may be proved by evidence that:
(1) a declaration of their marriage has been signed as provided by this subchapter;or
(2) the man and woman agreed to be married and after the agreement they lived together in this state as husband and wife and there represented to others that they were married.
(b) If a proceeding in which a marriage is to be proved as provided by Subsection (a)(2) is not commenced before the second anniversary of the date on which the parties separated and ceased living together, it is rebuttably presumed that the parties did not enter into an agreement to be married.
(c) A person under 18 years of age may not:
(1) be a party to an informal marriage;or
(2) execute a declaration of informal marriage under Section 2.402.
(d) A person may not be a party to an informal marriage or execute a declaration of an informal marriage if the person is presently married to a person who is not the other party to the informal marriage or declaration of an informal marriage, as applicable.
I, however, must be honest with you and state that you cannot sue someone for essentially leading you on--you cannot sue them for promising to marry and then failing to do so. The courts would not permit such a cause of action. You can pursue benefits if you have writing promising benefits, or if you can prove that he and you were essentially informally married (as that would then require him to obtain a divorce) based on the statute above.